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Drive Train Of A Vehicle

a technology of a drive train and a drive shaft, which is applied in the direction of positive displacement liquid engines, hybrid vehicles, piston pumps, etc., can solve the problems of corresponding drag losses in addition to the output of additional torque, and achieve the effects of low construction effort or expense, increased torque that can be introduced into the drive train, and low construction cos

Inactive Publication Date: 2014-07-31
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a system where a charge pump can be used as a pump and motor in a drive train. This allows for increased torque without needing to modify the hydraulic pump. The charge pump can be used to start an internal combustion engine or to assist it during acceleration or traction operation. This results in improved efficiency and reduced fuel usage. Additionally, this allows for the use of a hydraulic starter to start the engine, further reducing fuel consumption.

Problems solved by technology

No additional hydraulic motors are required in the drive train that are operated with hydraulic fluid from the hydraulic accumulator and which are used only to deliver additional torque to the drive train and which cause corresponding drag losses in addition to the output of an additional torque.

Method used

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  • Drive Train Of A Vehicle
  • Drive Train Of A Vehicle
  • Drive Train Of A Vehicle

Examples

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Embodiment Construction

[0042]FIG. 1 is a schematic illustration of a drive train 1 of the invention of a mobile machine, e.g., of an industrial truck or a piece of construction or agricultural equipment.

[0043]The drive train 1 includes an internal combustion engine 2, such as a diesel engine, a traction drive 3 driven by the internal combustion engine 2, and working hydraulics 4 driven by the internal combustion engine 2.

[0044]In the illustrated exemplary embodiment, the traction drive 3 is a hydrostatic traction drive which includes a variable displacement drive pump 5 driven by a connection with an output shaft 6 of the internal combustion engine 2. The traction pump 5 is in communication with one or more fixed or variable intake hydraulic motors in a closed-circuit, which intake hydraulic motors are in an operative connection with the driven wheels of the machine in a conventional manner.

[0045]The traction drive 3 can alternatively be an electric traction drive with an electric generator driven by the ...

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PUM

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Abstract

A drive train (1) includes an internal combustion engine (2) and working hydraulics (4) having at least one hydraulic pump (7). When operated as a pump, the hydraulic pump (7) sucks hydraulic fluid from a tank (9) and delivers into a delivery line (10) that leads to the working hydraulics (4). When operated as a motor, the hydraulic pump (7) is supplied with hydraulic fluid from a hydraulic accumulator (25). The drive train (1) has a charge pump (20) to supply a charging circuit (23). The charge pump (20), when operated as a pump, sucks hydraulic fluid out of the tank (9) and delivers into a charge pressure line (22) that leads to a charging circuit (23), and the charge pump (20) when operated as a motor is supplied with hydraulic fluid from the hydraulic accumulator (25).

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority to German Application No. DE 102012111296.7 filed Nov. 22, 2012, which is herein incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to a drive train of a vehicle, such as a mobile machine, with an internal combustion engine and working hydraulics driven by the internal combustion engine. The working hydraulics have at least one hydraulic pump driven by the internal combustion engine, which hydraulic pump can be operated as a pump and as a motor. When operated as a pump, the hydraulic pump takes in hydraulic fluid from a tank on a suction side and delivers into a delivery line that leads to the working hydraulics. When operated as a motor, the hydraulic pump can be supplied with hydraulic fluid from a hydraulic accumulator on the suction side. The drive train has a charge pump driven by the internal combustion engine to supply a ch...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B35/00
CPCF04B35/002F15B2211/20523F15B2211/851E02F9/2217F02N7/00B66F9/22F15B2211/20546F15B1/033E02F9/2289F02N11/0814F15B2211/20576F15B2211/212E02F9/2296F15B1/024F15B2211/88F15B2211/613F02N7/08E02F9/2292F15B2211/781F15B2211/20569B60K2006/126B60K6/12Y02T10/62B60W20/19
Inventor KRITTIAN, LUKASSTEIGERWALD, MARTINOBERHAUSSER, MARTINLANGEN, ALFRED
Owner LINDE HYDRAULICS
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